Brake shoe



Patented June 12, 1928.

UNITE STAT imam rnrsnr orrics.

MONTGOMERY w. mo y, or crrrcaoo, ILLINOIS, nssxonon TO nnnmxrnm comm, or onrceeo, rumors, A conrom'rron or rumors.

BRAKE SHOE.

Application filed I'ebruary 16, 1931. Serial No. 188,507.

This invention relates to brake shoes, and is illustrated as embodied in one of the end shoes of a three-shoe type of internal ex pending automobile brake. An ob'ect of a the invention is to form the shoe or the ready attachment of the brake lining, preferabl by means of fastenings having heads seate in transverse depressions extending across the shoe and drawing the lining into no the depressions.

' According to one feature of the invention, the shoe has a stifiening web built up of two parts, which may be radial portions forming arts of two elements or stampings secure is Back to back to form the shoe, the parts having mating depressions which jointly form a radial opening through the shoe for the stem ofthe fastening which holds the lining. I prefer to form the end of the shoe with so spaced stifi'enin webs (which may it de' sired be extend as spaced arms a a ted to straddle the end of an adjacent shoe with a separate insert secured between the webs to form a continuation of the friction face m of the shoe, and with a transverse depres sion for the last fastening extending across the face of the insert.

The above and other objects and features of theinvention, including various novel and as desirable details of construction,will be apparent from the following description of one illustrative embodiment shown in the acc'ompanying drawing, in; which:

Figure 1 is a side elevation of the shoe; Figure 2 is a partial section throu h the end lot the shoe on the line 2-2 Figure Figure 3 is a cross section through the shoe on the line 3-3 of Figure 1; a Figure d is a cross section through the shoe on the line 1-4 ofFigure 1; and

Fi 5 is a partial inside elevation of the s oe, looking in thedirection out the arrows 5-5 of F1 re 1.

as The illustrat shoe is intended for use as one oi the end shoes of a three-shoe brake such as is fully described in Patent No. 1,567,716, granted Bendix Brake Company on Decem er 29,1925, on application oi to A. Y. Dodge. It includes generally two elements or stamped sections riveted or otherwise secured back tobacl-I, and comprising radial portions 10, preferably reinforced b short outwardly-extending flanges 12 at as air inner edges, and which webs or. parts jointly form the stifienin web of the shoe. The friction face of the s oe is formed bycylindrical flanges 14 which are preferably integral parts of the same elements or stampings as the web portions 10.

In this particular shoe, in order to permit the end of the shoe to overlap the end of the adjacent shoe, webs 10 are spread apart at one end of the shoe to form spaced stiffening webs 16 which extend as spaced pivot arms beyond the end of the shoe. Between these webs is welded or otherwise secured a separate insert 18, which is flush with flanges 14 so that it forms a continuation of the friction face of the Shoe. At the other end of the shoe there is a cam thrust plate 20 riveted to short end flanges 22 on web portions 10. At this end of the shoe, an opening .24 is provided for a post formmg part of a shoe-positioning device fully described in the above-identified Dodge patent and in Patent No. 1,604,394, granted Bendix Brake Company on October 26, 1926, on application of A. Y. Dodge. Openings 26 are provided in arms 16 for the anchor of an ad acent shoe the end of which is straddled by those arms.

The resent invention relates principally to securing to the shoe a piece of brake 1min 28 Preferably flanges 14 are formed wit allned grooves 30, and the extensions of these flanges at the lower end of the shoe (to other with the insert 18} are formed wit similar alined grooves 32,. to provide transverse depresssions extendin across the 7 shoe. The lining is drawn into t esedepreesions by the heads 34: of T-shaped'fastenings. The stems 36 of the two upper fastenings extend through radial openings en tirely through the shoe and formed by w mat depressions pressed into the parts 10 which term the stiffening web, the radial 0 ning for the stem 36 of the uppermost, ng being in the space between thrust plate 20 and opening 24. The stem mo 38 of the lowermost fastening extends through insert 18, between webs 16. The lining is held clamped in place by nuts 40 threaded on stems 36 and. 38.

In attaching the lining, the uppermost m and lowermost fastenings are tightened up first, whereupon the tightenin of the middle fastening serves to stret h the lining ti htly'upon the friction face of the shoe.

M19 one illustrative embodiment has no been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment, or otherwise than by the terms of the appended claims.

I claim: 1. A brake shoe having an arcuate outer surface formed with a transverse depression,

web, said parts being formed with mating depressions jointly forming aradial opening through the shoe.

' 7. A brake shoe having a stiffening web and a thrust plate at one end of the web, the web having an opening therethrough' near the end with the thrust plate and havinga radial 0 ening entirely through the 86 shoebetween t e thrust plate and the first opening. Y

8. A brake shoe having at least ad'acent one end two spaced webs integral wit outwardly-extendmg cylindrical flanges, and a 00 and having two stifi'ening parts jointly form a stiffening web and which are provided with mating depressions jointly forming agenerally radial opening intersecting the transverse depression.

2. A brake shoe having an arcuate outer surface formed with a transverse depression,

and having two stifl'ening parts jointlyflanges forming an arcuate outer surface formed with a transverse depression, and having radial portions forming two stifiening parts jointly forming a stiffening web with a transverse depression, .and the other and which are provided with mating depressions jointly forming a generally radial opening intersecting the transverse depres- 81011. M v

4. A brake shoe element'having two pertions at right angles to each other, one of which is cylindrically curved and formed of which is formed with a radial depression intersecting the transverse depression.

. 5. A brake shoe having a stiffening web built up of two parts secured together, said parts being formed. with mating depressions jointly forming a radial opening through the shoe.

6. A. brake shoe comprising two elements secured back to back and having parts which jointly form a double-thickness stiffening separate insert secured between the webs and flushwith the surfaces of the cylindrical flan es, the insert and the cylindrical flanges aving alined grooves jointly forming a depression extending across the shoe:

9. A brake shoe having at least'a'djacent one end two spaced webs integral with outwardly-extendmg cylindrical flanges, and a separate insert secured between the webs.

and flush with the surfaces of the c lindri- .70

cal flan es, the insert and the cylindrical flanges aving alined grooves jointl forming a depression extending across t 0 shoe, the insert having an opening in the bottom of its groove for the stem of a fastening having its head in the depression.

10. A brake shoe having, at least adjacent one end, a cylindrical outer surface formed with a transverse depression, and havin with rake lining on the outer surface and a fastening havin a head in the depression and a stem exten ing through the shoe be- I I tween the stifiening webs.

two stiffening webs, in combination '9 11. A brake shoe comprising two elements 3 I secured together, and having cylindrical flanges jointl formin the friction face of the shoe, sai flanges aving alined grooves which form a transverse depression extendin across the friction facetestimony whereof, I' have hereunto signed my name.-

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